高压直流输电系统中换相失败Hypersim仿真分析

Commutation failure analysis of HVDC systems using Hypersim

Hypersim是一套功能强大、接口方便、适应性广的全数字实时仿真系统,它能为HVDC换相失败问题的研究提供快速、灵活和准确的电磁暂态仿真。基于Hypersim建立了单极12脉波HVDC系统的详细模型,并分析了一次系统和控制系统的具体结构。对逆变器交流母线发生单相接地短路和三相接地短路故障的情况进行了仿真计算,研究换相失败的判定依据。仿真结果表明,Hypersim能够准确模拟HVDC系统发生换相失败情况,以及通过在控制系统中实施保护控制,能有效抑制换相失败的发生。

Hypersim is a widely used and fully digital simulator with powerful functions and convenient interfaces,which provides the fast,flexible and accurate electromagnetic transient simulation for the commutation failure study of HVDC system. A detailed 12-pulse monopolar HVDC system is established based on Hypersim,and the structures of primary system and control system are given. The single- phase and three- phase grounding faults of inverter AC bus are researched and the criteria of commutation failures are analyzed. Simulation results show that,Hypersim simulates the commutation failures of HVDC system accurately and the implementation of protective control may restrain the occurrence of .commutation failures effectively.